Diego Marani is also an essayist and novelist.[3] His most famous novel, New Finnish Grammar (Nuova grammatica finlandese), has been translated into several languages and has received the Grinzane Cavour literary prize in Italy. His other novels include Las Adventures des Inspector Cabillot (1998, written in Europanto), L'ultimo dei Vostiach (The Last of the Vostiaks), L'interprete, Il Compagno di scuola, and Enciclopedia tresigallese. As an essayist, Diego Marani wrote A Trieste con Svevo and Come ho imparato le lingue. His last book, La bicicletta incantata, was made into a movie by Elisabetta Sgarbi, editor in chief of Bompiani publishing house and art producer. Diego Marani regularly writes for the cultural page of the Italian daily Il Sole 24 Ore.

[Note: A common internet problem occurs when utilising terms such as 'last' or 'latest' when even the writer must realise that such terms will become inaccurate. While 'final' or 'completed' are OK, any other temporal expressions should be qualified. The 'last' book mentioned above, 'La Bicicletta Incantata', was published in 2007. A more recent novel of Marani's, 'Il Cane di Dio' was published 2012 and issued in English as 'God's Dog' in that year as well.]